Eirdu, Carrier of Dawn
Mikaeus, the Unhallowed
Altar of Dementia

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield (Eirdu as Isilu, Carrier of Twilight on the battlefield).
You control another nontoken non-Human creature with base toughness 2 or greater.

   Steps

How does this combo work?
1
Activate Altar of Dementia by sacrificing another nontoken non-Human creature
2
When the creature dies, its undying ability triggers, returning the creature from your graveyard to the battlefield with a +1/+1 counter on it.
3
Activate Altar of Dementia by sacrificing the creature with a +1/+1 counter on it.
4
When the creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
5
Resolve the Altar of Dementia abilities from step 1 and 3.
6
Repeat.

   Results

What do I get from this combo?
Infinite LTB
Infinite ETB
Infinite sacrifice triggers
Infinite death triggers
Infinite mill
Infinite self-mill
Eirdu, Carrier of Dawn
18%inclusion647 decks3.59K decks
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New Cards
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33%inclusion2 decks6 decks
27%synergy
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30%inclusion219 decks742 decks
28%synergy
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29%inclusion160 decks556 decks
28%synergy
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26%inclusion196 decks742 decks
26%synergy
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20%synergy
High Synergy Cards
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85%inclusion630 decks742 decks
79%synergy
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73%synergy
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73%synergy
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66%synergy
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64%synergy
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64%synergy
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74%inclusion552 decks742 decks
63%synergy
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63%synergy
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68%inclusion19 decks28 decks
62%synergy
Top Cards
Swords to Plowshares
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15%synergy
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62%synergy
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62%synergy
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61%synergy
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Game Changers
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11%synergy
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9%synergy
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17%synergy
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6%synergy
Creatures
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56%synergy
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54%synergy
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58%synergy
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53%inclusion393 decks742 decks
50%synergy
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39%synergy
Corpse Knight
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44%synergy
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48%inclusion354 decks742 decks
44%synergy
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46%inclusion342 decks742 decks
38%synergy
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45%inclusion14 decks31 decks
29%synergy
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42%synergy
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44%inclusion7 decks16 decks
42%synergy
Butcher Ghoul
41%inclusion307 decks742 decks
41%synergy
Esper Sentinel
41%inclusion305 decks742 decks
22%synergy
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40%inclusion300 decks742 decks
36%synergy
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40%inclusion295 decks742 decks
32%synergy
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38%synergy
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39%inclusion12 decks31 decks
38%synergy
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29%synergy
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35%inclusion11 decks31 decks
31%synergy
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30%synergy
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8%synergy
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30%synergy
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32%synergy
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33%inclusion243 decks742 decks
30%synergy
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32%inclusion10 decks31 decks
16%synergy
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19%synergy
Mayhem Devil
32%inclusion9 decks28 decks
22%synergy
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21%synergy
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21%synergy
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17%synergy
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26%synergy
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25%synergy
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24%synergy
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24%synergy
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22%synergy
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21%synergy
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22%synergy
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16%synergy
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10%synergy
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14%synergy
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Instants
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Silence
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Worldly Tutor
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4%synergy
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12%synergy
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7%synergy
Entomb
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4%synergy
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5%synergy
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-24%synergy
Stroke of Midnight
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Flare of Malice
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6%synergy
Dawn's Truce
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1%synergy
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3%synergy
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Imp's Mischief
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Clever Concealment
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3%synergy
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Sorceries
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33%synergy
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35%synergy
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37%synergy
Toxic Deluge
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16%synergy
Farseek
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-4%synergy
Three Visits
29%inclusion9 decks31 decks
5%synergy
Nature's Lore
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-2%synergy
Eerie Ultimatum
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15%synergy
Faithless Looting
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9%synergy
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12%synergy
Night's Whisper
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Bridgeworks Battle
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12%synergy
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-1%synergy
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-5%synergy
Austere Command
13%inclusion98 decks742 decks
1%synergy
Agadeem's Awakening
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10%synergy
Kodama's Reach
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-14%synergy
Living Death
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7%synergy
Blasphemous Act
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-22%synergy
Sevinne's Reclamation
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3%synergy
Life from the Loam
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5%synergy
Rampant Growth
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-23%synergy
Sign in Blood
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1%synergy
Grim Tutor
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5%synergy
Imperial Seal
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3%synergy
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-4%synergy
Buried Alive
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2%synergy
Dread Return
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2%synergy
Wrath of God
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1%synergy
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-1%synergy
Damnation
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3%synergy
Vindicate
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0%synergy
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5%synergy
Feed the Swarm
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-11%synergy
Utility Artifacts
Lightning Greaves
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21%synergy
Blasting Station
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39%synergy
Birthing Pod
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24%synergy
Swiftfoot Boots
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-3%synergy
Hedge Shredder
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17%synergy
The Great Henge
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10%synergy
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12%synergy
Bolas's Citadel
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5%synergy
Jet Medallion
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9%synergy
The One Ring
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3%synergy
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7%synergy
Spawning Pit
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7%synergy
Wishclaw Talisman
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0%synergy
Enchantments
Bastion of Remembrance
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51%synergy
The Meathook Massacre
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39%synergy
Black Market Connections
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23%synergy
Rhythm of the Wild
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12%synergy
Grave Pact
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29%synergy
Mystic Remora
31%inclusion5 decks16 decks
15%synergy
Thran Vigil
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31%synergy
Bitterblossom
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27%synergy
Impact Tremors
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19%synergy
Phyrexian Arena
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11%synergy
Rooftop Storm
25%inclusion4 decks16 decks
23%synergy
Greater Good
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18%synergy
Animate Dead
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5%synergy
Land Tax
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8%synergy
Birthing Ritual
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12%synergy
Dictate of Erebos
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9%synergy
Funeral Room // Awakening Hall
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9%synergy
Thunder of Unity
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9%synergy
Underworld Breach
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5%synergy
Sothera, the Supervoid
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9%synergy
Necropotence
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5%synergy
Pernicious Deed
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8%synergy
Tribute to the World Tree
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5%synergy
Insidious Roots
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4%synergy
Sylvan Library
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1%synergy
Martyr's Cause
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7%synergy
Barrensteppe Siege
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5%synergy
Fanatical Devotion
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6%synergy
Trouble in Pairs
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2%synergy
Grave Venerations
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4%synergy
Planeswalkers
Grist, the Hunger Tide
23%inclusion7 decks31 decks
19%synergy
Liliana, Dreadhorde General
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13%synergy
Vivien on the Hunt
16%inclusion5 decks31 decks
16%synergy
Tyvar, Jubilant Brawler
16%inclusion5 decks31 decks
13%synergy
Vivien, Champion of the Wilds
13%inclusion4 decks31 decks
12%synergy
Dihada, Binder of Wills
11%inclusion3 decks28 decks
7%synergy
Elspeth, Storm Slayer
8.6%inclusion64 decks742 decks
4%synergy
Utility Lands
Phyrexian Tower
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53%synergy
Urborg, Tomb of Yawgmoth
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34%synergy
Bojuka Bog
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14%synergy
Boseiju, Who Endures
42%inclusion13 decks31 decks
23%synergy
Shifting Woodland
39%inclusion12 decks31 decks
32%synergy
High Market
32%inclusion240 decks742 decks
30%synergy
Reliquary Tower
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0%synergy
Takenuma, Abandoned Mire
26%inclusion192 decks742 decks
17%synergy
Otawara, Soaring City
25%inclusion4 decks16 decks
9%synergy
Cabal Coffers
22%inclusion160 decks742 decks
12%synergy
Susur Secundi, Void Altar
19%inclusion142 decks742 decks
17%synergy
Vault of the Archangel
19%inclusion142 decks742 decks
7%synergy
Mistrise Village
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11%synergy
Eiganjo, Seat of the Empire
16%inclusion122 decks742 decks
10%synergy
Abandoned Air Temple
15%inclusion100 decks661 decks
10%synergy
Midgar, City of Mako
13%inclusion95 decks742 decks
9%synergy
Westvale Abbey
12%inclusion90 decks742 decks
10%synergy
Nesting Grounds
11%inclusion83 decks742 decks
9%synergy
Spymaster's Vault
9.3%inclusion69 decks742 decks
7%synergy
Command Beacon
8.9%inclusion66 decks742 decks
4%synergy
Urza's Saga
8.8%inclusion65 decks742 decks
2%synergy
Nykthos, Shrine to Nyx
7.3%inclusion54 decks742 decks
2%synergy
Mana Artifacts
Sol Ring
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10%synergy
Arcane Signet
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16%synergy
Talisman of Hierarchy
63%inclusion470 decks742 decks
37%synergy
Orzhov Signet
51%inclusion380 decks742 decks
28%synergy
Talisman of Conviction
43%inclusion12 decks28 decks
19%synergy
Talisman of Indulgence
43%inclusion12 decks28 decks
15%synergy
Talisman of Dominance
31%inclusion5 decks16 decks
-1%synergy
Fellwar Stone
30%inclusion222 decks742 decks
10%synergy
Talisman of Progress
25%inclusion4 decks16 decks
0%synergy
Dimir Signet
19%inclusion3 decks16 decks
-5%synergy
The Soul Stone
18%inclusion134 decks742 decks
14%synergy
Mind Stone
16%inclusion118 decks742 decks
1%synergy
Thought Vessel
14%inclusion107 decks742 decks
-3%synergy
Lotus Petal
11%inclusion79 decks742 decks
4%synergy
Chrome Mox
8.9%inclusion66 decks742 decks
3%synergy
Mana Vault
7.4%inclusion55 decks742 decks
2%synergy
Crowded Crypt
5.4%inclusion40 decks742 decks
4%synergy
Mox Diamond
5.4%inclusion40 decks742 decks
1%synergy
Lands
Breeding Pool
100%inclusion9 decks9 decks
58%synergy
Command Tower
90%inclusion666 decks742 decks
16%synergy
Godless Shrine
83%inclusion615 decks742 decks
42%synergy
Temple Garden
81%inclusion25 decks31 decks
41%synergy
Overgrown Tomb
74%inclusion23 decks31 decks
33%synergy
Isolated Chapel
71%inclusion526 decks742 decks
37%synergy
Hallowed Fountain
69%inclusion11 decks16 decks
29%synergy
Watery Grave
69%inclusion11 decks16 decks
27%synergy
Vault of Champions
65%inclusion480 decks742 decks
41%synergy
Caves of Koilos
63%inclusion465 decks742 decks
34%synergy
Shattered Sanctum
60%inclusion442 decks742 decks
45%synergy
Marsh Flats
57%inclusion424 decks742 decks
47%synergy
Savai Triome
54%inclusion15 decks28 decks
30%synergy
Indatha Triome
52%inclusion16 decks31 decks
24%synergy
Bleachbone Verge
51%inclusion382 decks742 decks
43%synergy
Fetid Heath
51%inclusion380 decks742 decks
38%synergy
Blood Crypt
50%inclusion14 decks28 decks
12%synergy
Tainted Field
47%inclusion350 decks742 decks
34%synergy
Sacred Foundry
46%inclusion13 decks28 decks
10%synergy
Volcanic Island
44%inclusion4 decks9 decks
30%synergy
Tropical Island
44%inclusion4 decks9 decks
30%synergy
Zagoth Triome
44%inclusion4 decks9 decks
17%synergy
Steam Vents
44%inclusion4 decks9 decks
6%synergy
Stomping Ground
44%inclusion4 decks9 decks
3%synergy
Spectator Seating
43%inclusion12 decks28 decks
20%synergy
Luxury Suite
43%inclusion12 decks28 decks
19%synergy
Undergrowth Stadium
42%inclusion13 decks31 decks
19%synergy
Shadowy Backstreet
42%inclusion309 decks742 decks
31%synergy
Brightclimb Pathway
39%inclusion290 decks742 decks
31%synergy
Underground Mortuary
35%inclusion11 decks31 decks
23%synergy
Savannah
35%inclusion11 decks31 decks
23%synergy
Bayou
35%inclusion11 decks31 decks
22%synergy
Bountiful Promenade
35%inclusion11 decks31 decks
14%synergy
Taiga
33%inclusion3 decks9 decks
21%synergy
Spara's Headquarters
33%inclusion3 decks9 decks
6%synergy
The World Tree
33%inclusion3 decks9 decks
6%synergy
Jetmir's Garden
33%inclusion3 decks9 decks
5%synergy
Dragonskull Summit
32%inclusion9 decks28 decks
-3%synergy
Shineshadow Snarl
31%inclusion232 decks742 decks
19%synergy
Tundra
31%inclusion5 decks16 decks
17%synergy
Raffine's Tower
31%inclusion5 decks16 decks
7%synergy
Sea of Clouds
31%inclusion5 decks16 decks
7%synergy
Exotic Orchard
30%inclusion220 decks742 decks
-7%synergy
Wastewood Verge
29%inclusion9 decks31 decks
22%synergy
Lush Portico
29%inclusion9 decks31 decks
20%synergy
Sunpetal Grove
29%inclusion9 decks31 decks
1%synergy
Woodland Cemetery
29%inclusion9 decks31 decks
-3%synergy
Sulfurous Springs
29%inclusion8 decks28 decks
5%synergy
Nomad Outpost
29%inclusion8 decks28 decks
0%synergy
Underground Sea
25%inclusion4 decks16 decks
10%synergy